/* ====================================================================
 * Copyright (c) 2011 The OpenSSL Project.  All rights reserved.
 * Copyright (c) 2013 Red Hat, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
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 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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 */

#include <string.h>
#include <openssl/crypto.h>
#include <openssl/dh.h>
#include <openssl/fips.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/bn.h>
#include "fips_locl.h"

#ifdef OPENSSL_FIPS

static const unsigned char dh_test_2048_p[] = {
    0xAE, 0xEC, 0xEE, 0x22, 0xFA, 0x3A, 0xA5, 0x22, 0xC0, 0xDE, 0x0F, 0x09,
    0x7E, 0x17, 0xC0, 0x05, 0xF9, 0xF1, 0xE7, 0xC6, 0x87, 0x14, 0x6D, 0x11,
    0xE7, 0xAE, 0xED, 0x2F, 0x72, 0x59, 0xC5, 0xA9, 0x9B, 0xB8, 0x02, 0xA5,
    0xF3, 0x69, 0x70, 0xD6, 0xDD, 0x90, 0xF9, 0x19, 0x79, 0xBE, 0x60, 0x8F,
    0x25, 0x92, 0x30, 0x1C, 0x51, 0x51, 0x38, 0x26, 0x82, 0x25, 0xE6, 0xFC,
    0xED, 0x65, 0x96, 0x8F, 0x57, 0xE5, 0x53, 0x8B, 0x38, 0x63, 0xC7, 0xCE,
    0xBC, 0x1B, 0x4D, 0x18, 0x2A, 0x5B, 0x04, 0x3F, 0x6A, 0x3C, 0x94, 0x39,
    0xAE, 0x36, 0xD6, 0x5E, 0x0F, 0xA2, 0xCC, 0xD0, 0xD4, 0xD5, 0xC6, 0x1E,
    0xF6, 0xA0, 0xF5, 0x89, 0x4E, 0xB4, 0x0B, 0xA4, 0xB3, 0x2B, 0x3D, 0xE2,
    0x4E, 0xE1, 0x49, 0x25, 0x99, 0x5F, 0x32, 0x16, 0x33, 0x32, 0x1B, 0x7A,
    0xA5, 0x5C, 0x6B, 0x34, 0x0D, 0x39, 0x99, 0xDC, 0xF0, 0x76, 0xE5, 0x5A,
    0xD4, 0x71, 0x00, 0xED, 0x5A, 0x73, 0xFB, 0xC8, 0x01, 0xAD, 0x99, 0xCF,
    0x99, 0x52, 0x7C, 0x9C, 0x64, 0xC6, 0x76, 0x40, 0x57, 0xAF, 0x59, 0xD7,
    0x38, 0x0B, 0x40, 0xDE, 0x33, 0x0D, 0xB8, 0x76, 0xEC, 0xA9, 0xD8, 0x73,
    0xF8, 0xEF, 0x26, 0x66, 0x06, 0x27, 0xDD, 0x7C, 0xA4, 0x10, 0x9C, 0xA6,
    0xAA, 0xF9, 0x53, 0x62, 0x73, 0x1D, 0xBA, 0x1C, 0xF1, 0x67, 0xF4, 0x35,
    0xED, 0x6F, 0x37, 0x92, 0xE8, 0x4F, 0x6C, 0xBA, 0x52, 0x6E, 0xA1, 0xED,
    0xDA, 0x9F, 0x85, 0x11, 0x82, 0x52, 0x62, 0x08, 0x44, 0xF1, 0x30, 0x03,
    0xC3, 0x38, 0x2C, 0x79, 0xBD, 0xD4, 0x43, 0x45, 0xEE, 0x8E, 0x50, 0xFC,
    0x29, 0x46, 0x9A, 0xFE, 0x54, 0x1A, 0x19, 0x8F, 0x4B, 0x84, 0x08, 0xDE,
    0x20, 0x62, 0x73, 0xCC, 0xDD, 0x7E, 0xF0, 0xEF, 0xA2, 0xFD, 0x86, 0x58,
    0x4B, 0xD8, 0x37, 0xEB
};

static const unsigned char dh_test_2048_g[] = {
    0x02
};

static const unsigned char dh_test_2048_pub_key[] = {
    0xA0, 0x39, 0x11, 0x77, 0x9A, 0xC1, 0x30, 0x1F, 0xBE, 0x48, 0xA7, 0xAA,
    0xA0, 0x84, 0x54, 0x64, 0xAD, 0x1B, 0x70, 0xFA, 0x13, 0x55, 0x63, 0xD2,
    0x1F, 0x62, 0x32, 0x93, 0x8E, 0xC9, 0x3E, 0x09, 0xA7, 0x64, 0xE4, 0x12,
    0x6E, 0x1B, 0xF2, 0x92, 0x3B, 0xB9, 0xCB, 0x56, 0xEA, 0x07, 0x88, 0xB5,
    0xA6, 0xBC, 0x16, 0x1F, 0x27, 0xFE, 0xD8, 0xAA, 0x40, 0xB2, 0xB0, 0x2D,
    0x37, 0x76, 0xA6, 0xA4, 0x82, 0x2C, 0x0E, 0x22, 0x64, 0x9D, 0xCB, 0xD1,
    0x00, 0xB7, 0x89, 0x14, 0x72, 0x4E, 0xBE, 0x48, 0x41, 0xF8, 0xB2, 0x51,
    0x11, 0x09, 0x4B, 0x22, 0x01, 0x23, 0x39, 0x96, 0xE0, 0x15, 0xD7, 0x9F,
    0x60, 0xD1, 0xB7, 0xAE, 0xFE, 0x5F, 0xDB, 0xE7, 0x03, 0x17, 0x97, 0xA6,
    0x16, 0x74, 0xBD, 0x53, 0x81, 0x19, 0xC5, 0x47, 0x5E, 0xCE, 0x8D, 0xED,
    0x45, 0x5D, 0x3C, 0x00, 0xA0, 0x0A, 0x68, 0x6A, 0xE0, 0x8E, 0x06, 0x46,
    0x6F, 0xD7, 0xF9, 0xDF, 0x31, 0x7E, 0x77, 0x44, 0x0D, 0x98, 0xE0, 0xCA,
    0x98, 0x09, 0x52, 0x04, 0x90, 0xEA, 0x6D, 0xF4, 0x30, 0x69, 0x8F, 0xB1,
    0x9B, 0xC1, 0x43, 0xDB, 0xD5, 0x8D, 0xC8, 0x8E, 0xB6, 0x0B, 0x05, 0xBE,
    0x0E, 0xC5, 0x99, 0xC8, 0x6E, 0x4E, 0xF3, 0xCB, 0xC3, 0x5E, 0x9B, 0x53,
    0xF7, 0x06, 0x1C, 0x4F, 0xC7, 0xB8, 0x6E, 0x30, 0x18, 0xCA, 0x9B, 0xB9,
    0xBC, 0x5F, 0x17, 0x72, 0x29, 0x5A, 0xE5, 0xD9, 0x96, 0xB7, 0x0B, 0xF3,
    0x2D, 0x8C, 0xF1, 0xE1, 0x0E, 0x0D, 0x74, 0xD5, 0x9D, 0xF0, 0x06, 0xA9,
    0xB4, 0x95, 0x63, 0x76, 0x46, 0x55, 0x48, 0x82, 0x39, 0x90, 0xEF, 0x56,
    0x75, 0x34, 0xB8, 0x34, 0xC3, 0x18, 0x6E, 0x1E, 0xAD, 0xE3, 0x48, 0x7E,
    0x93, 0x2C, 0x23, 0xE7, 0xF8, 0x90, 0x73, 0xB1, 0x77, 0x80, 0x67, 0xA9,
    0x36, 0x9E, 0xDA, 0xD2
};

static const unsigned char dh_test_2048_priv_key[] = {
    0x0C, 0x4B, 0x30, 0x89, 0xD1, 0xB8, 0x62, 0xCB, 0x3C, 0x43, 0x64, 0x91,
    0xF0, 0x91, 0x54, 0x70, 0xC5, 0x27, 0x96, 0xE3, 0xAC, 0xBE, 0xE8, 0x00,
    0xEC, 0x55, 0xF6, 0xCC
};

int FIPS_selftest_dh()
{
    DH *dh = NULL;
    int ret = 0;
    void *pub_key_bin = NULL;
    int len;
    BIGNUM *p = NULL, *g = NULL, *priv_key = NULL, *tmp_pub_key = NULL;
    const BIGNUM *pub_key;

    fips_load_key_component(p, dh_test_2048);
    fips_load_key_component(g, dh_test_2048);
    /* note that the private key is much shorter than normally used
     * but still g ** priv_key > p
     */
    fips_load_key_component(priv_key, dh_test_2048);
    if ((tmp_pub_key = BN_new()) == NULL)
        goto err;

    dh = DH_new();

    if (dh == NULL)
        goto err;

    DH_set0_pqg(dh, p, NULL, g);
    DH_set0_key(dh, tmp_pub_key, priv_key);

    if (DH_generate_key(dh) <= 0)
        goto err;

    DH_get0_key(dh, &pub_key, NULL);

    if (pub_key == NULL)
        goto err;

    len = BN_num_bytes(pub_key);
    if ((pub_key_bin = OPENSSL_malloc(len)) == NULL)
        goto err;
    BN_bn2bin(pub_key, pub_key_bin);

    if (len != sizeof(dh_test_2048_pub_key) ||
        memcmp(pub_key_bin, dh_test_2048_pub_key, len) != 0)
        goto err;

    ret = 1;

 err:
    if (dh)
        DH_free(dh);
    else {
        BN_free(p);
        BN_free(g);
        BN_free(priv_key);
        BN_free(tmp_pub_key);
    }

    OPENSSL_free(pub_key_bin);
    return ret;
}
#endif
